Reinforced concrete pipe structure.



H. R. MUMAHON. RBINFORGED CONCRETE PIPE STRUCTURE.

APPLICATION FILED JUNE 15, 1907.

912,318, Patentad Feb. i6, 1909.

2 SHEETS-SHEET lv H. R. MGMAHON. REINFORGED GONG'ISETB PIPE STRUCTURE.

. APPLICATION FILED JUNE l5, 1907. 91 2,3 18.

Patent-,ed Feb.16,19o9.

--2 SHEETS- SHEET 2.

x 1li/#1265866.

'REEFORGEB CSE? Speciceton of Patented Feb. 23, lz'.

To all 'whom rit mn/1,1 cene-ee.

.Be it .mewn that L Hem? R. E/.Ul/Qe-QN, a citizen of the United States, resident ef Cevelanrl, county of Cuyahoga, and State Ohio, have invented .e new ami .useful 'hw provement in Reinforced Con-crete Pipe Steueltures; effet-ich the'folewng is e-egeeicah tion, 'the pr-nepe of the invention bereit: explained imci the best .mede in whet. have -contempeted .applying tei prmepie se as to distinguish it fwm other inventions.

My invention relates to reinfeieed cencPete pipe structures .and met''xede et .melting the same, its ebect bei-ng to povde e. pipe' structure 0f this character which steelt )el ecumenical in its manufacture :amt e mientn its use. The nventen furthemreeels to that dass of pipe structures which are formed by pacng reinforcing hee-gps 01 bands' ef metal end'metettensiem mezyzbee in im anzuuall mold and then 'peeling C021 crete or cement in su-eh'fmold te ferm the pipe section. It has heretofore been :eemerl essentiel 'that e pipe Section cenetruete in this manner be provided wte renteeeag tensien members placed pemllel with ta, axis of the section se v.es te reinferce structure against rupture when it ie pacec undef conditions .toad such es to cause it to act es a beam supperted et its ends. The reinforcing rings er heo'pe :ae useri te edd 11o the strength et the section im oeieting rupture when the toed is aetngmt, right :ein 'es tothe mais of theeecton and the stelle ture is supported at'al peints ntezme" ete of its ends. have found, however, that nasmueh as in almost-al1 eases Whee cencfete pipe structures ofthis character have been used, .they ere Seldom called upon to es e beemfan'd that therefere -ittle etese if an need be tai-d upen the pzovsien efthe'telsion membes in the struct-ure.. En this ette ease the entire section may 'be considered as a series of adjacentconerete ring eectieias placed contiguous to each atleeteeeh Ting seetlcm being reinforced @depende y ezt the cei'xtlguees mugs to reslst .a erushmg leed.

exim on et' the two contiguous meeting ende ci eseemns, the 'gemt 2er-med em L et my mffeetee ig. i3 :fepesentee veltflee axial section of a, portion of the jened ends et Such two erections, shew- 'e-g e. medtef teem of jen't. .Fg regeeeemte perspective:View 'Eef one end ezt-.weee- .nventem ehmveg the a. second moderl ehel ef the fseek@ et et y te disclose another'em ereez'eeut bleh may iee t 6 eepreee e per-epe" we view et twefdeteehed eeetiem of' pipe embedyng my im' ien, the :terni 'eqme being. that lustealte.

shown. in this il Figs. est?.

ter'ng tiret te lgsjl and p ying-the prnepe etmy;msiste .out @be cone'ete -shet 'A 1e is embedded a Wife fabric E. e may' be any :me et vaxiifms fen- 1s ie know-n ee wire fence and ,ie beet inte .a eyindreel frmef di meter und in 2eme? that embers 'W i .ferm hoops :er ht 'er stay .members if e merey servingto 'heid ,time e piece yWhile-ttm concrete @weed into the molds. Kt is to tee that; while the stzzymembes Z1', the above dese'bed pesitem This wie fabric is readily obtainable in the market at a comparatively low cost. v)Furthermore it provides when bent as previously described, o. series of: reinforcing rings all connected. together whereby all the rings so formed to be Used in the concrete pipe may be 'placed in the mold at one time, thus greatly facilitating the worlr ot assembling the pipe sections sind reducingr the ernennt ot' labor attendant thereon. A single reinforo ing structure such as above described ond embedded in the section provides ay section embodying the advantages previously nicntioned but in order to obtain a section hav-- `ing the greatest number oil advantages I crnbed two of these cylindrical structures in each section, the one of larger diameter be- ,ing place/l near the outer edge of the shell of the section and the otherv being placed near the inner edge ot' said section. ln this manner the tension side of the shell, no inatter 'which portionthereo' may be at the top or the bottom, is always reinforced, as will readily be understood by those skilled. in the art. l

In Eig. t l have shown o. second form ot fabric which may be used es reinforcing materiel, such forni being that commonly known as wire or oonltry-netting- AAs in the previousl described Structure this letter form of abrio is bent into cylindrical form so as to canse these'rneinbers which were cie signed to ect as tension members when need es :i tence, to bent into reinforcing rings.

The use of manufactured fabric such as above described furthermore enables nie to i Y take advantage of the tensile strength of the materiel of whichv these fabrics are nitide, and also or 'the non-stretching quolities which this material possesses, it being well known' that the wire used in the nia'nufcctnre of fence, 1s, as a. result ot the process of its manufacture, possessed o' a high degree 'of tensile strength and a. comparatively greet coefficient olf elasticity, :1nd will permit or very little strot-chine.' :is compared with the tensile strength. and coei'licient otelosticity [of rolled. steel rods heretofore used :tor this purpose. Y 'Tie manner of joining two pine sections according to the principle ot' my f may be effected in various ways,an

fore stated Figs. 2 and 5 represent two di'tferent ways 1n which the jointl ture shown ,in Fig. 2. According' 'to tl s method the end of one section reduced .in

diameter Vas at a2 and intermediate ort tbe shoulder z3 and vthe extremity a" ist formed a groove n whose main surface is inclined to the axis of the section, that is nitide con 'ical in outline. The opposite end of the sinne section is countersnnk., such end of the conf tlguous'pipe section being' show-n in einem Such countersunk portion is mede ot" a diameter sulticient to admit the reduced end of the other section, and such countersunk portion is furthermore formed with s conical groove o similar to that or" a5 of the other section. lZVhen these two -sections are placed end to end as shown, the reduced end portion oit lthe one and the countersnnlt portion of the other form an interior space a7 which is entirely incloscd by the shells of the two sections. ln this space is placed e. reinforcing ring C and by means of s. suitable opern ture e5 which may be either formed in the section or which may be made by breaking away e part of the end of the countersunk section end, the said s ace a7 is lled with an indurating materia. such as cement or concrete. This material is allowed to set and thus etl'ect the permanent connection of `shown in dotted lines, into the overlapping portions of the two section ends, whereby it is seen that each such overlapping portion is reinforced as a ring. In this manner it Will be seen that e very elective joint is made between the two sections. t

In the lnodiicd form illustrated in Fig. 3 the reduced portion only is shownto be provided with a conical groove. In( Figs. 5 and l have es before stated. illustratedo 'third form of joint. in this forni the countersunli sind reduced ortions of the sections are provided with plein cylindrical rooves as shown, the joint so formed and tie method of forming same being in other ther modes oi applying the principle ot' Y my invention may be employed, instead of the one exploined and change may be niedeos .regards the mechanism herein disclosed, pgovided then eens covered by any one of the following claims be employed. I, thereiore, particularly point out and distinctly claim :is my invention l. In n reinforcedconcrete pipe structure, the combina on with two contiguous pipe sections, each having an inner and an onter cylindrical reinforcing member each mede ot wire fabric embedded. in their `*respective shells;` the end ot one section overlapping and secured to the end of the other; the one outer :-:'einl'or nng member projecting into and embedded 1n such oyerlripping portion of.,All its` corres-j )onding ysection andl the' inner reinforcing member of the other" section progecti-ng into and embedded inthe over- 2.-.i lapped portion of the other section. 

